Another thought, how robust is the balustrade if the force is inwards toward
the balcony? Also, plants can be very heavy and lets hope you hang the
fixings on the structural part of the balustrade, since I've seen the
vertical wrght iron parts of railings come adrift when small children swing
on them due, no doubt to poor top fixing strength.
Brian

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"newshound" wrote in message
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On 26/01/2020 11:52, harry wrote:
On Sunday, 26 January 2020 11:45:56 UTC, Mike Halmarack wrote:
I'm planning to hang a balcony wide board for use as a table or plant
stand. I'd probably find it easiest to cut and shape the hangers from
aluminium. These would hang on the inside of the balcony's balustrade
which is made from galvanised iron or steel.
Would these dissimilar metals suffer any adverse reaction when in long
term contact with each other?
--

Mike

The activity series. The further they are apart, the faster any reaction.

https://en.wikipedia.org/wiki/Reacti... de_potentials

But not if they are insulated. The simplest solution might be to use
something like heat shrink, PVC tube, or even a tight wrapping of PVC tape
over the potential contact points.